What was found
AFTER T/O AND GEAR RETRACTED, DOOR NOT LATCH LIGHT REMAINED ON. RAN CHECKLIST, NO HELP. RETURNED TO MIA. FOUND BROKEN WIRE AT LEFT LANDING GEAR DOOR SW AND FROZEN BOLT AT RT MAIN GEAR LATCH ASSY. REPAIRED WIRE IAW 20-50-0 AND CLEAN AND LUBRICATED BOLT IAW 20-10-0, OPS CK NORMAL IAW 32-31-4.